15% a day? Mate you are craazy, it is more than impossible and i am more than sure in that you are never goign to be achieving those numbers in less than 24 hours. Take inconsideration that we are still on a bear market, the volatility is more than high
in the altcoin market where there is at least a dozen pumps every day earning 15% profit per day is considered nothing! it is actually quite easy to do if you master the market and learn how to detect these pumps before it is too late and get on board to ride the manipulation partially to the top and make your profit.
whenever you are in doubt go to
https://coinmarketcap.com/all/views/all/ and sort the list based on 24 hour change and see the daily pumped coins.
Lol, that's the magic of altcoins, there are lots of altcoins that pump almost every day and could rise tens of percent and if you're good at looking for them, You will make a big profit. but you also have to be careful, because if you miss the pump.,you might lose, because after that massive dump will occur and make the price plunge, thats why altcoin trading is very risky